SELECT * FROM MyTable
WHERE MyField = ‘BobDillon‘ COLLATE Latin1_General_CI_AI

SELECT *
FROM MyTable
WHERE NLSSORT(MyField, ‘NLS_SORT = Latin_CI‘) = NLSSORT(‘BobDillon‘, ‘NLS_SORT = Latin_CI‘)

CREATE TABLE test1 (
    a text COLLATE "de_DE",
    b text COLLATE "es_ES",
    ...
);
SELECT a < (‘foo‘ COLLATE "fr_FR") FROM test1;

CREATE TABLE t1 (
  id          NUMBER,
  company     VARCHAR2(15 CHAR) COLLATE BINARY_CI,
  CONSTRAINT t1_pk PRIMARY KEY (id)
);

INSERT INTO t1 VALUES (1, ‘L?wenbrauerei‘);
INSERT INTO t1 VALUES (2, ‘L?wenbrauerei‘);
INSERT INTO t1 VALUES (3, ‘Lowenbrauerei‘);
INSERT INTO t1 VALUES (4, ‘LOwenbrauerei‘);
COMMIT;


ALTER TABLE t1 ADD (
  location  VARCHAR2(15 CHAR) COLLATE BINARY_AI
);


UPDATE t1 SET location = ‘Br?unlingen‘ WHERE id = 1;
UPDATE t1 SET location = ‘Br?unlingen‘ WHERE id = 2;
UPDATE t1 SET location = ‘Braunlingen‘ WHERE id = 3;
UPDATE t1 SET location = ‘BrAunlingen‘ WHERE id = 4;
COMMIT;


SELECT *
FROM   t1
WHERE  location LIKE ‘%?%‘;

    ID COMPANY       LOCATION
---------- --------------- ---------------
         1 L?wenbrauerei   Br?unlingen
         2 L?wenbrauerei   Br?unlingen
     3 Lowenbrauerei   Braunlingen
     4 LOwenbrauerei   BrAunlingen


-- 也支持表级别默认的COLLATE
CREATE TABLE t1 (
  id          NUMBER,
  company     VARCHAR2(15 CHAR),
  CONSTRAINT t1_pk PRIMARY KEY (id)
)
DEFAULT COLLATION BINARY_CI;

-- schema级别也支持默认的COLLATE
CREATE USER test2 IDENTIFIED BY test2
  DEFAULT TABLESPACE users
  QUOTA UNLIMITED ON users
  DEFAULT COLLATION BINARY_CI;

-- 还支持语句级别、会话级别